锻压技术

铝合金型材拉弯有限元模拟

英文标题：Finite element simulation of stretch bending on aluminum alloy extrusions

关键词：有限元模拟拉弯型材 ABAQUS/显示

分类号：

出版年,卷(期):页码：2015,40(4):54-59

摘要：

型材拉弯成形过程模拟属于高度非线性准静态问题，选择动力显示模块进行数值模拟时，需要考虑模拟分析步时间的敏感性。针对通用的型材拉弯工艺，在模拟分析步时间的敏感性分析基础上，采用ABAQUS/Explicit模块，建立了型材拉弯成形的准静态分析有限元模型。并采用ABAQUS/Standard模块分析预测回弹、侧壁厚度和截面畸变。为验证模拟方法的有效性，采用A-7B数控拉弯成形机完成2024-O铝合金Z型截面型材拉弯试验，测量试验件的回弹量、厚度和截面畸变情况。试验与模拟结果对比表明：补拉伸量对回弹量、厚度和截面畸变的影响趋势一致，其中，回弹量和厚度的平均相对误差分别为13.74%，1.66%。建立的模型能有效地应用于铝合金型材拉弯成形模拟。

The issue of simulation on stretch bending process of aluminum alloy extrusions is one of the problems in highly nonlinear quasi-static fields. When the explicit dynamics procedure is applied to quasi-static problems, the sensitivity of time on simulation analysis step is required to consider specially. Based on it, FE shell model of quasi-static analysis on stretch bending was established by ABAQUS/Explicit module for general stretch bending process. Then the springback，side-wall thickness and cross-section distortion were analyzed and predicted by static analysis with ABAQUS/Standard. An experiment of stretch bending on Al-2024-O extrusions with Z-section was carried out by A-7B CNC stretch bending forming machine,and the effectiveness of simulation was verified. The springback value, thickness and distortion of cross-section of parts were measured,and compared with the simulation results. The experiment results show the influences of post-stretching strain on the springback value, minimum thickness and cross-section distortion are coincide with the simulation results. And the average relative errors of springback and thickness are 13.74% and 1.66% respectively. It is demonstrated that the established model can be effectively applied to simulation of stretch bending of aluminum alloy.

基金项目：

国家自然科学基金资助项目(51275420)；航空科学基金资助项目(2008ZE53037)

吴静明（1976-），男，本科，工程师

参考文献：

[1]Vollertsen F, Sprenger A, Kraus J.Extrusion, channel, and profile bending: A review[J].Journal of Materials Processing Technology,1997,87:1-27.

[2]Ouakdi E H, Louahdi R, Khirani D.Evaluation of springback under the effect of holding force and die radius in a stretch bending test[J].Materials & Design,2012,35:106-112.

[3]Miller J E, Kyriakides S. Three-dimensional effects of the bend-stretch forming of aluminum tubes[J].International Journal of Mechanical Sciences,2003,45:115-140.

[4]Corona E.A simple analysis for bend-stretch forming of aluminum extrusions[J].International Journal of Mechanical Sciences,2004,46(3):433-448.

[5]Yoshida M, Yoshida F, Konish H.Fracture limits of sheet metals under stretch bending[J].International Journal of Mechanical Sciences,2005,47(12):1885-1896.

[6]Nanu N, Brabie G.Analytical model for prediction of springback parameters in the case of U stretch-bending process as a function of stresses distribution in the sheet thickness[J]. International Journal of Mechanical Sciences,2012,64:11-21.

[7]Paulsen F, Welo T.Application of numerical simulation in the bending of aluminium-alloy profiles[J].Journal of Materials Processing Technology,1996,58(2-3):274-285.

[8]刘瑞.Y型材拉弯成形有限元模拟技术研究[D].西安:西北工业大学,2012.

Liu R. FEM Simulation Technology on Stretch Bending for Y Section Profile[D]. Xian: Northwestern Polytechnical University,2012.

[9]Clausen A H, Hopperstad O S, Langseth M.Sensitivity of model parameters in stretch bending of aluminium extrusions[J]International Journal of Mechanical Sciences,2001,43:427-453.

[10]刁可山, 周贤宾, 金朝海,等.复杂截面型材力控制拉弯成形数值模拟分析[J].材料科学与工艺,2004,12(4):413-416.

Diao K S, Zhou X B, Jin C H,et al. A numerical study on the force-controlled stretch bending of aluminum extrusion with complex cross section[J]. Materials Science and Technology，2004,12(4):413-416.

[11]刘天骄,王永军,吴建军,等.大型客机铝锂合金型材拉弯成形关键技术[J].航空制造技术,2012,17(1):40-44.

Liu T J,Wang Y J, Wu J J,et al. Large aircraft Al-Li alloy profiles stretch bending key technology[J]. Aeronautical Manufacturing Technology,2012,17(1):40-44.

[12]刘天骄,王永军,吴建军,等.低成本钣金成形模具技术[J].航空制造技术,2012,(8):49-52.

Liu T J,Wang Y J, Wu J J,et al. Large technology of low-cost sheet metal forming mould and die [J]. Aeronautical Manufacturing Technology, 2012,(8):49-52.

[13]刘天骄, 王永军, 夏晓娇,等.型材拉弯数值模拟轨迹建模方法[J].锻压技术2014,39(7):132-137.

Liu T J, Wang Y J, Xia X J,et al. Trajectory modeling of extrusion stretch bending simulation [J]. Forging & Stamping Technology, 2014,39(7):132-137.

[14]刘天骄, 王永军, 夏晓娇, 等. 数控拉弯机在飞机框缘类型材成形中的应用[J]. 锻压技术, 2014, 39(8): 47-53.

Liu T J, Wang Y J, Xia X J,et al. Application of CNC stretch bending forming machine to aircraft frames and strips [J]. Forging & Stamping Technology, 2014, 39(8):47-53.

[15]Guan Y, Pourboghrat F, Barlat F. Finite element modeling of tube hydroforming of polycrystalline aluminum alloy extrusions[J]. International Journal of Plasticity, 2006,22(12):2366-2393.

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